Lifting device



: 1933- J. s. PEHRSSON 1,929,956

LIFTING DEVICE Filed Aug. 14, 1930 awe/whoa Jw/N S IDEA/E66 aw Patented Oct. 10, 1933 UNITED STATES LIF'IYING DEVICE John S. Pehrsson, Elyria, Ohio, assignor of one-' half to John M. 'Gemberling, Lakewood, ohio v Application August 14, 1930.. Serial No. 475,183

'6 Claims. (Cl. 254-131) 1 My invention relates to a lifting devi'ce. It.

has to do more particularly with that type of device which will lift heavy objects to such a position that a dolly-or rollers may be placed thereunder. In the past, to lift heavy objects to a height great enough to insert rollers it has been necessaryito use a block and a crow bar to first lift one end and then repeat the operation on the other side. It has often been advisable to block up the object by first placing a small block under one end then under the other end, and by steps repeating the operation to increase'tne height'of blocks until the desired position has been obtained. In other cases the procedure has been to have a group of men first tip the ob- -,iect on one end'then place a roller or dolly thereunder and then lift the object onto the carrying means. In the case of heavy objects of furniture" or cases such as refrigerators and the like the-use of a bar has a tendency to mar the beauty of the. object and hence reduce the value thereof or causesloss to the movers. Further- --more the present methods of lifting heavy objects of this type requires the services of too many men to handle the job economically.

One of the objects of my invention is'tc provide a means for lifting heavy objects to a position where a dolly or the like may be placed thereunder.

Another object of my invention is to provide an elevating device which will lift one end of an object to a predetermined position and to assure the maintenance of the position until the opposing end can be lifted. l

Another object of my invention is to provide a means of lifting furniture such as refrigerators and the like without damage thereto and with as few men as possible.

My invention comprises generally two frame castings disposed in spaced relation on'a tilting rod. This framework is ,adaptedto have pivotally-mounted thereon a supporting surface. The rocking of the cradle so formed is effective to raise or lower the supporting surface.

Further objects and advantageous features will be apparent from the following detailed description wherein similar characters of reference designate corresponding parts and wherein:

Fig. 1 is a perspective view partly broken away showing the preferred form of my invention in assembled relation and holding an object in elevated position;

Fig. 2 is a front elevation partly broken away, of my lifting device;

surface 14.

thereby shifting the'center of gravity to -a point 1 which will assure the retention of the *device in Fig. '3 is aside elevation of the device shown in Fig. 2 and Fig. 4 is a plan view of my lifting device showing the tilting bar assembled thereto.

With reference'to the drawing, I have .shown 41 the preferred embodiment .of my invention wherein the lifting device is composed of two castings or cam elements '10 .cf similar construction and which aredisposedin spaced relation'nn the tubular. tilting bar 11. The castings 110 have a cylindrical boss 12 extending from opposing sides of the castings and which are centrally boredito receive the tilting bar 11. Pins 13 .extend through the bosses and through :thebar 11 to secure the bar in fixed ings.

The castings 11' have 'a bearing surface :14 formed upon one side thereof which is adapted to engage the floor andsupport the load when the object is in raised position. Adjacent the bearing surface 14 are the bearings "15 "which are adapted :to receive the opposing ends of the roller shaft 1-6 upon which is rotatably' mounted the roller 17. In raising an object the device is rotated about the roller 17 and ontothe bearing :80

These bearing surfaces 14, when in contact with the floor :permit the shaft20 upon which the platform is mounted to lie in a-plane this position.

a A lug 18 formed integrally with the body portionof the casting and extendedtherefrom forms a bearing surface 19 when the device is in lowered position. Apertures 19a disposed in the lugs 18 receive a-shaft 20. A platform of angular cross section has depending flanges 22 formed on the opposing sides of the bottom plate 23: The flanges '22 are provided with apertures 24 through 1'- whichthe'shaft 20 passes. "The-platform '21 is mounted freely on the shaft so that it may find the suitable angu-lated relation to theobject to be elevated when adjusted thereto. A pad'25 of rubber orother suitable material is secured to the ,L'iOO be moved has been tipped or raised to permit the L510 relation upon-the .cast- I bottom plates 23 of each of the devices to be slid thereunder. A wrench or bar is then applied to the end of the tilting rod 11 and the frame is revolved about the fulcrum roller as indicated by the arrow in Fig. 3. The device will then take the position as shown in Fig. 1 with the object in raised position to place a dolly or rollers thereunder.

It will be apparent from the foregoing description that I have provided a lifting device of such a structure that heavy objects having their bottom resting on the floor or relatively close thereto may be easily elevated by one man to such a position that a dolly or similar means for moving such object may be inserted thereunder.

While the foregoing description is necessarily of a detailed character it is to be understood that the specific terminology employed is not to be construed as restrictive or limiting, and it is to be further understood that various rearrangements of parts and modifications may be resorted to without departing from the scope or spirit of the invention as claimed herein.

I claim:

'1. A lifting device comprising spacedlcam-acting frame members having in general a triangular contour with one side of the triangle serving as a load supporting bearing surface, a tilting bar projecting through and rigidly secured to said frame members and provided with a handle extremity projecting from one side thereof, and an angleshaped platform pivotally mounted at one extrernity of said members, the handle extremity of said bar serving as a lever which when rotated initiates a cam action to said frame members and turns them together with the load about one extremity of the triangle and throws the load past 7 the center'of gravity of the frame members onto formed substantially flat to serve as a load-supporting bearing surface, a tilting bar rigidly secured to said frame members and provided with a handle extremity projecting at right angles therefrom, and an angle-shaped load-engaging platform pivotally mounted at the extremity of the triangle which lies substantially opposite the said bearing side, the handle extremity of said bar serving as a lever which when rotated initiates a cam action to said frame members and turns them together with the load about one extremity of the triangle and throws the load past the center of gravity of said members onto said bearing surface. A

3. A lifting device comprising spaced cam-acting frame members having in general a triangular contour, one of the sides of the triangle being shaped load-engaging platform pivotally mounted at the extremity of the triangle which lies substantially opposite the said bearing side, the handle extremity of said bar serving as a lever which when rotated initiates a cam action to said frame members and turns them together with the load about one extremity of the triangle and throws the load beyond the center of gravity of said members onto said bearing surface, and a bearing roller for supporting the load while turning the frame members.

4. A lifting device comprising spaced cam acting frame members having in general a triangular contour, a tilting bar rigidly secured to said frame members and provided with a handle extremity projecting at right angles therefrom, an opensided angle-shaped load-engaging platform pivotally mounted at one extremity of the triangle, the handle extremity of said bar serving as a torque lever which when rotated initiates a cam action to said frame members and turns them together with the load-engaging platform past the center of gravity of said members onto the opposite side of the triangle.

5. A lifting device comprising spaced cam acting frame members at least two sides of which have substantially a right angular contour, one of the sides of the angle being formed substantially flat to serve as a load-supporting bearing surface, a tilting bar projecting through and rigidly secured to said frame members and provided with a handle extremity projecting at right angles therefrom, an open-sided angle-shaped load-engaging platform pivotally mounted at the one extremity of the angles which lies substantially opposite the said bearing side, the handle extremity of said bar serving as a lever which when rotated initiates a cam action to said frame members and turns them together wth the load about the apex of the angle and throws the load past the center of gravity of said members onto said bearing surface, and a bearing located at the apex of the angle for supporting the load during the turning movement.

6. A lifting device comprising spaced cam acting frame members each having two sides thereof formed at substantially right angles with respect to one another, one side of the angle serving as a bearing surface while the load is being engaged and the opposite side of the angle serving as a. bearing surface for. supporting the load after the at the extremity of the angle, the han dle extrem-- ity of said bar serving as a lever which when rotated initiates a cam action to said frame members and turns them togetherwith the load about one extremity of the angle and throws the load past the center of gravity of said members onto said second named bearing surface, and a bearing roller mounted in the extremity of the angle which supports the load during the turning operation. JOHN S. PEl-IRSSON. 

